Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5720
Number of amino acids:95
Molecular Weight:9486.23 Da
Theoretical pI:7.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1818.95%
Cysteine CYS (C)88.42%
Glutamic Acid GLU (E)22.11%
Aspartic Acid ASP (D)22.11%
Glycine GLY (G)77.37%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)22.11%
Histidine HIS (H)11.05%
Lysine LYS (K)11.05%
Methionine MET (M)44.21%
Leucine LEU (L)1010.53%
Asparagine ASN (N)11.05%
Glutamine GLN (Q)66.32%
Proline PRO (P)1010.53%
Serine SER (S)44.21%
Arginine ARG (R)44.21%
Threonine THR (T)77.37%
Tryptophan TRP (W)00%
Valine VAL (V)88.42%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC402
HydrogenH677
NitrogenN117
OxygenO122
SulphurS12

FormulaC402H677N117O122S12
Total Number of Atoms:1330


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):4
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    500
Absorption 0.1% (=1 g/l)    0.053,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.000

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.59

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.05, 23.16, 35.79]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:92.6315
Grand average of hydropathicity (GRAVY):0.53